Since 1986 enrollments of African Americans, American Indians, and Hispanic Americans in full time engineering programs in the United States has steadily increased, while the number of other students who enter the field has fallen.

Ahas steadily increased, while the number of other students who enter the field has fallen
分析该选项

Bhas steadily increased, while other students entering the field have declined in number
分析该选项

Cincreased steadily, while there was a decline in the number of other students entering the field
分析该选项

Dhave steadily increased, while the number of other students entering the field has fallen
分析该选项

Ehave steadily increased, while that of other students who enter the field fell
分析该选项